The history of luaTEX 2006–2009 / v 0.50 - Pragma ADE

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If node memory usage stays high, i.e. is not reclaimed, this can be an indication of a memory
leak. In the December 2007 beta version there is such a leak in math subformulas,
something that will be resolved when math node processing is opened up. The current
MkIV code cleans up most of its temporary data. We do so, because it permits us to keep
an eye on unwanted memory leaks. When writing this chapter, some of the peaks in the
graphics coincided with peaks in the runtime per page, which is no surprise.
If you want to run such tests yourself, you need to load a module at startup:
\usemodule[timing]
The graphics can be generated with:
\def\ShowUsage {optional filename}
\def\ShowNamedUsage {optional filename}{red graphic}{blue graphic}
\def\ShowMemoryUsage{optional filename}
\def\ShowNodeUsage {optional filename}
(This interface may change.)
Collecting garbage 161